/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLDrv.h
FlushType: Flush Immediate (seems wrong)
virtual void RHIReadSurfaceFloatData ( [FRHITexture](API\Runtime\RHI\FRHITexture) * Texture, FIntRect Rect, [TArray](API\Runtime\Core\Containers\TArray)< [FFloat16Color](API\Runtime\Core\Math\FFloat16Color) > & OutData, ECubeFace CubeFace, int32 ArrayIndex, int32 MipIndex )